Welcome to the Community! Let’s check a couple of things out. Your camera may need to be serviced.
Make sure your battery is fully charged and retaining the power. Batteries can get worn out as they age.
Next up, your memory card. What capacity memory card are you using? They, too, are susceptible to failure as they age. Be sure to only use full size memory cards. Don’t share the card with other devices. Reading is harmless. Allowing other devices to write or erase files is not.
If you have reset the camera, let’s try using the Intelligent Auto shooting mode, the green [A+], on the top dial. Does it still black out?
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